Add 45/70 and 70/20
1st number: 45/70, 2nd number: 3 10/20
45/70 + 70/20 is 29/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
45/70 = 45 × 2/70 × 2 = 90/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
70/20 = 70 × 7/20 × 7 = 490/140 - Add the two like fractions:
90/140 + 490/140 = 90 + 490/140 = 580/140 - 580/140 simplified gives 29/7
- So, 45/70 + 70/20 = 29/7
In mixed form: 41/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+70/20 45/70+70/40 45/70+70/60